Tool 08
Thai auspicious days Thong Chai, Athibodi and holy days of each month
Thong Chai, Athibodi, Ubat and Lokawinat days with Buddhist holy days by month
Kala Yoga of the year
Kala Yoga CS 1388 (16 Apr 2026 to 15 Apr 2027)
Next 30 days
No Thong Chai or Athibodi day in this period.
Belief to weigh, not a final word.
Auspicious days by month
What the Kala Yoga labels mean
Thong Chai day
Thongchai is the favorable label of the Kalayok table. The text says any undertaking succeeds with good results, brings victory and becomes a treasured emblem for the whole group.
Opening a shop, sowing rice in the field, and matters of objects and places.
One day can carry both Thongchai and Lokawinat, so a favorable label and an unfavorable one can sit together.
Athibodi day
Athibodi is a favorable label that the text ties to authority, prestige, standing as the head, and governing or overseeing others.
Matters concerning people, such as conferring rank and title.
The text applies Athibodi mainly to people, while Thongchai applies to objects and places.
Ubat day
Ubat is an unfavorable label. Today's texts call it inauspicious, with obstacles, trade that does not take off, and a bad turn of events.
Trade, and matters of a person that the text judges with this label.
The older text from the Fourth Reign wrote Ubasana, meaning drawing near, so its sense was milder than the one used now.
Lokawinat day
Lokawinat, also called the Khlup day, is an unfavorable label. The text describes confusion, delay, disorder and loss.
Group matters shared by everyone, and matters of objects and places.
One day can carry two labels, and the older text counts Lokawinat as the only unfavorable label of the Kalayok.
Holy days and the phases of the moon
Waxing 8
The 8th day of the waxing moon is the half moon of the waxing phase, lit by half from afternoon to early evening, and one of the four Buddhist observance days of the month.
Going to the temple, offering alms, listening to the teaching, and taking the 5 or 8 precepts.
The date in the calendar follows a market count by day, so it does not match the true shape of the moon every night.
Waxing 15, full moon
The 15th day of the waxing moon is the full moon, shining whole through the night, and one of the four observance days of the month.
Making merit by offering food to monks, keeping the observance precepts, and listening to the sermon.
The day before is called Wan Kon, when Thai monks traditionally shave their heads, and it is not an observance day.
Waning 8
The 8th day of the waning moon is the half moon of the waning phase, lit by half from before dawn to morning, and an observance day.
Hearing the teaching at the temple, discussing it, and taking the observance precepts.
The waning half moon is seen before dawn, unlike the waxing half moon seen from afternoon to early evening.
Waning 14 or 15, new moon
The 15th day of the waning moon is the new moon, with no moon in sight, and falls on the observance day of a full month.
Going to the temple, making merit, keeping the precepts, and practicing meditation.
A short month places its last observance day on the 14th of the waning moon, which the calendar shows for each month.
What is Kala Yoga
Kala Yoga is a table in the Thai calendar that marks which times of the year are favourable and which are unfavourable. It has four labels: Thong Chai and Athibodi are favourable, Ubat and Lokawinat are unfavourable. Each label is tied to a weekday, a watch of the day, a lunar mansion, a sign and a lunar day.
The table changes with each year of the Chula Sakarat era, which begins on the Thai new year day around 16 April, not on 1 January. Most texts look only at the weekday, so this page shows the labels of the weekday, the watch and the lunar day, and leaves out the mansion and the sign.
This tool shows the labels of the next 30 days, the waxing or waning day of each date, the Buddhist holy days and a calendar for each month. Every value comes from the Thai lunar calendar, not the Chinese one, and nothing about you is used on this page.
Questions about Thai auspicious days
How can one day be both Thong Chai and Lokawinat? +
The texts set each label on its own, so in some years the same weekday carries a favourable and an unfavourable label. This page shows both labels as the texts give them and does not choose between them.
Can I use this to pick a day to collect a new car or move house? +
The texts tie Thong Chai days to things and places and Athibodi days to people, so people who follow them check the day labels before collecting a car, moving house, marrying or opening a shop. This page shows the day labels only, with no filter by activity.
Which days are Buddhist holy days? +
Holy days fall on the 8th and 15th waxing days, the 8th waning day and the last waning day of the month, which is the 14th in a short month or the 15th in a full month.
Why are some months not shown yet? +
This page shows only the period where the lunar days match the official calendar already announced. Later months open once the religious holidays of that year are announced.